Robot cleaner, robot cleaner system and control method of the same

ABSTRACT

The robot cleaner includes a case, a suction device provided in the case, a suction nozzle for sucking dust from a floor by driving of the suction device, a dust collection device for collecting foreign substances contained in the air sucked via the suction nozzle, a wheel unit to allow movement, a main controller for controlling the driving of the suction device and the wheel unit, a Wi-Fi module provided in the case to provide Access Point (AP), and a NFC module provided in the case to provide an external terminal with AP information for accessing to the AP through NFC communication.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority under 35 U.S.C. §119 to KoreanApplication No. 10-2013-0159727, filed on Dec. 19, 2013, whose entiredisclosure is hereby incorporated by reference.

BACKGROUND

1. Field

The present disclosure relates to a robot cleaner, a robot cleanersystem and a control method of the same, more particularly, to a robotcleaner of which a cleaning history may be figured out easily by a userthrough an external terminal, a robot cleaner system and a controlmethod of the same.

2. Background

A robot cleaner is an electric home appliance for cleaning a floor orcarpet of a room. The robot cleaner includes an air suction deviceprovided in a cleaner case and the air suction device consists of amotor and a fan. After sucking external air containing foreign mattersby driving the air suction device, the robot cleaner separates theforeign matters to collect dust and exhausts the clean air havingforeign substances separated there from.

A vacuum cleaner may include a manual vacuum cleaner directly operatedby a user and a robot cleaner that performs cleaning for itself, withoutuser's operation.

The robot cleaner sucks foreign matters (e.g., dust) from the floor in aregion set to clean, while driving the region itself. Also, the robotmay perform cleaning, while automatically driving a cleaning region withusing an obstacle sensor or while manually driving via a remote controldevice wirelessly linked to the robot cleaner.

However, it is difficult to expand controlling of the robot cleanerusing the remote control. In other words, it is difficult to input otherfunctions through the remote control, except the input set in the remotecontrol. Methods for controlling a robot cleaner through a smart phone,not a remote control exclusively used for the robot cleaner are on therise.

Recently, a robot cleaner having a camera module mounted therein isprovided and such a camera module may generate image information on aroom. Accordingly, the security of the robot cleaner can be important.When the robot cleaner is hacked from outside, image information about aroom may be exposed to a hacker via a camera module.

As a result, a robot cleaner and a robot cleaner system including thesame need to be provided which can be controlled by the user easily viaa smart phone, with an enhanced security performance.

Meanwhile, such the robot cleaner generally performs cleaning, whileautomatically driving. In many instances, even when the user is awayfrom home, the robot cleaner cleans the room, while drivingautomatically. In other words, the robot cleaner may not often performcleaning in accordance with the user's direct operation.

Accordingly, it is difficult for the user to check whether the robotcleaner performs cleaning or not. It is also difficult to notice whetherthe robot cleaner completes the cleaning through the house, in otherwords, an overall cleaning area to the user.

BRIEF DESCRIPTION OF THE DRAWINGS

The embodiments will be described in detail with reference to thefollowing drawings in which like reference numerals refer to likeelements wherein:

FIG. 1 is a perspective diagram illustrating a robot cleaner accordingto one embodiment of the disclosure;

FIG. 2 is a perspective diagram illustrating an inner structure of therobot cleaner according to one embodiment of the disclosure;

FIG. 3 is a lower perspective diagram of the robot cleaner according toone embodiment of the disclosure;

FIG. 4 is a block diagram of a robot cleaner composing a robot cleanersystem according to one embodiment of the disclosure;

FIG. 5 is a block diagram of a remote control device composing the robotcleaner system according to one embodiment of the disclosure;

FIG. 6 is a front perspective diagram of the remote control devicecomposing the robot cleaner system according to one embodiment of thedisclosure, seen in front;

FIG. 7 is a rear perspective diagram of the remote control devicecomposing the robot cleaner according to one embodiment of thedisclosure;

FIG. 8 is a side view illustrating NFC communication between an externalterminal and the robot cleaner according to one embodiment of thedisclosure;

FIG. 9 is a plane view illustrating a rear surface of an upper coverprovided in the robot cleaner;

FIG. 10 is an enlarged perspective diagram of a wireless LAN cardstarting to be coupled to the upper cover;

FIG. 11 is an enlarged perspective diagram of the wireless LAN card justbefore coupled to the upper cover; and

FIG. 12 is a plane view a location relation among a main controller, aWi-Fi module and a NFC module in the upper cover.

DETAILED DESCRIPTION

FIG. 1 is a perspective diagram illustrating a robot cleaner accordingto one embodiment of the disclosure. FIG. 2 is a perspective diagramillustrating an inner structure of the robot cleaner according to oneembodiment of the disclosure. FIG. 3 is a lower perspective diagram ofthe robot cleaner according to one embodiment of the disclosure. FIG. 4is a block diagram of a robot cleaner composing a robot cleaner systemaccording to one embodiment of the disclosure.

The robot cleaner 100 may include a cleaner case 110 that defines anexterior appearance of the robot cleaner 100, a suction device 120provided in the cleaner case 110, a suction nozzle 130 configured tosuck dust on the floor via the driving of the suction device 120 and adust collector 140 configured to collect foreign matters from the suckedair.

The cleaner case 110 of the robot cleaner 100 may be formed in acylinder shape with a relatively smaller height than a diameter, inother words, a flat cylinder shape. It may have a square shape withcircular corners. In the cleaners 110 may be provided the suction device120, the suction nozzle 130 and the dust collector 140 in communicationwith the suction nozzle 130.

In an outer circumferential surface of the cleaner case 110 may beprovided a sensor (not shown) configured to sense a distance to a wallor an obstacle in a room, a bumper (not shown) configured to damp ashock generated by collision and a wheel unit 150 configured to move therobot cleaner 100. The wheel unit 150 may be projected to the outsidefrom in inside of the case 110, especially, a floor of the room.

The wheel unit 150 may consist of a left driving wheel 152 and a rightdriving wheel 154 which are installed in both lower portions of thecleaner case 110, respectively. the left and right driving wheels 152and 154 are configured to be rotated by a left wheel motor 152 a and aright wheel motor 154 a controllable by a cleaner controller 160,respectively, such that the robot cleaner 100 can change a direction inaccordance with the driving of the left and right wheel motors 152 a and154 a automatically, while performing room-clean.

At least one auxiliary wheel 156 may be provided in a bottom of thecleaner case 110 and the auxiliary wheel 156 may minimize frictionbetween the robot cleaner 100 and the floor and guide the motion of therobot cleaner 100 simultaneously.

FIG. 4 is a block diagram of a cleaner controller 160 provided in therobot cleaner 100. The cleaner controller 160 linked to variouscomponents of the robot cleaner 100 to control the driving of the robotcleaner 100 may be provided in the cleaner case 110, for example, afront portion inside the robot case 110. Also, a battery 170 configuredto supply a power to the suction device 120 may be provided in thecleaner case 110, for example, a rear portion inside the robot case 110.

The suction device 120 configured to generate an air suction force maybe provided behind the battery 170 and the dust collector 140 may bedetachably coupled to a rear portion of a dust collector coupling partprovided in a rear portion of the suction device 120.

The suction nozzle 130 may be provided under the dust collector 140 andit may suck foreign matters with air. The suction device 120 may includea fan (not shown) inclinedly installed between the battery 170 and thedust collector 140, with being connected to a motor (not shown)electrically connected to the battery 170 and a shaft of the motor toblow air.

Meanwhile, the suction nozzle 130 may be exposed to a bottom of thecleaner case 110 via a hole (not shown) formed in the bottom of thecleaner case 110, only to contact with the floor of the room.

To control the robot cleaner 100 from a distance, the robot cleaner 100according to this embodiment may include a wireless communication unitor wireless module 190 that can wirelessly communicate with an externaldevice. Specifically, the wireless communication unit may be Wi-Fimodule.

The wireless communication unit 190 may be configured to communicatewith an external terminal via Wi-Fi. At this time, the external terminalmay be a smart phone having a Wi-Fi module mounted therein and such theexternal terminal will be described later.

Wi-Fi (Wireless LAN) means short range communication which canwirelessly communicate in a preset short range in a place where AP(Access Point) is installed, using a radio wave or an infraredtransmission. Accordingly, the wireless communication unit 190 may bethe Wi-Fi module 190 configured to enable Wi-Fi communication with theexternal terminal.

At this time, the Wi-Fi module 190 may provide AP. In other words, APmay be embedded in the robot cleaner. The external device may directlyconnect to AP of the robot cleaner, not connecting via an external APsuch as an internet router.

To directly perform Wi-Fi communication with the robot cleaner, theexternal terminal needs authentication to connect to the AP. Theexternal terminal has to figure out information on the robot cleaner andit connects to the AP via the robot cleaner information to getauthentication.

The robot cleaner information may include the AP information. The APinformation may include SSID (Service Set Identifier) of the AP and theAP information may also include a nick name of the robot cleaner. The APinformation may include a security key for access authentication.

The external terminal may access to the robot cleaner via the APinformation and Wi-Fi communicate with the robot cleaner after gettingauthentication, such that the external terminal can control the robotcleaner. In this instance, the controlling of the robot cleaner mayinclude remote-controlling of the driving of the robot cleaner andmonitoring of state information on the robot cleaner. Also, thecontrolling of the robot cleaner may include receiving of the diverseinformation figured out in the robot cleaner from the external terminal.

As mentioned above, the robot cleaner according to this embodimentsupplies self AP to Wi-Fi-communicate with the external terminaldirectly. In other words, the robot cleaner can Wi-Fi communicate withthe external terminal directly, not via external AP.

The robot cleaner may include a camera module 195. Using the camera 195,diverse image information on a room may be generated. Also, a map may becreated through the camera 195. In other words, a cleaning mapcorresponding to a cleaning area may be created.

Specifically, the camera 195 may include a front camera 196 and an uppercamera 197. The image information achieved through the camera module 195may be transmitted to the external terminal. For example, the user maycontrol the robot cleaner, while viewing image information displayed onthe external terminal.

If the robot cleaner and the external terminal are in Wi-Ficommunication via AP in the house, there is concern about weak security.In other words, when AP information in the house is exposed to astranger, he or she might control the robot cleaner discretionarily.That means that a stranger could acquire the indoor image informationthrough the robot cleaner discretionarily.

Accordingly, the robot cleaner according to this embodiment may directlyWi-Fi communicate with the external terminal, only to overcome such asecurity problem. The external terminal and the robot cleaner may Wi-Ficommunicate with each other directly through the AP provided by therobot cleaner. That means that the user may directly control the robotcleaner through the external terminal in a preset range of communicationareas.

As mentioned above, AP information has to be transmitted to the externalterminal to access to the AP of the robot cleaner through the externalterminal. For example, the user needs to input the AP information to theexternal terminal one by one.

However, it is hard or not easy for the user to memorize or directlyinput AP information. Accordingly, such AP information needstransmitting to the external terminal easily.

The robot cleaner according to this embodiment may include a NFC modulehaving AP information on self AP. Specifically, AP information includingSSID of AP is recorded in the NFC module 198 and such the AP informationmay be provided to the external terminal. A NFC module 198 correspondingto the NFC module 198 of the robot cleaner may be provided even in theexternal terminal.

The user may execute a specific application to control the robot cleanerthrough the external terminal. In this process, a process of registeringa robot cleaner to control in the external terminal.

For that, the user locates the external terminal near the NFC module 198of the robot cleaner, such that the AP information of the robot cleanercan be transmitted to the external terminal via NFC communication. Whensuch the AP information is registered in the external terminal, therobot cleaner to control is specified.

Once the user selects the robot cleaner to control via the application,the AP information may be transmitted to the robot cleaner andauthentication for access to the robot cleaner may be performed.

When the access is authenticated, Wi-Fi communication between the robotcleaner and the external terminal is performed and the user may controlthe robot cleaner via the Wi-Fi communication, using the externalterminal.

The AP information may be recorded in the NFC module 198 of the robotcleaner but wiring is not allowed. In other words, the NFC module 198allows only reading. In this instance, the NFC module may be configuredvery simply, because signal transmission with the controller 160 can beexcluded and because signal transmission with the Wi-Fi module 190 canbe excluded. The NFC module 198 may be configured to transmit only theAP information to the external terminal easily.

Meanwhile, an auxiliary controller different from the controller 160 forcontrolling the driving of the suction device 120 or the driving unit150 may be provided. The controller 160 for controlling the driving ofthe suction device 120 or the driving unit 150 may be called a maincontroller 160. The main controller 160 may control various sensors or apower device. The auxiliary controller may be the controller forgenerating location information of the robot cleaner and it may becalled the vision controller 165 for convenience sake. The maincontroller 160 and the vision controller 165 may exchange a signal viaserial communication.

The vision controller 165 may generate location information based on theimage information of the camera 195. Also, the Wi-Fi module 190 may bemounted in the vision controller 165.

Accordingly, the Wi-Fi module 190 may communicate with the visioncontroller 165 via serial communication.

The Wi-Fi module 190 may include a wireless LAN card. The wireless LANcard may be loaded in the main controller 160 or the vision controller165. Specifically, the wireless LAN card may be loaded in the visioncontroller 165 and the Wi-Fi module 190 may enable serial communicationwith the vision controller 165.

The main controller 160 and the vision controller 165 may compose anadditionally provided microcomputer. When diverse calculations areperformed, using the main controller 160, a problem of a slow processingspeed might be generated.

Signal transmission and reception via the Wi-Fi module 190 may becontrolled by the vision controller 165.

The wireless LAN card may be provided as a USB type and the USB typewireless LAN card may be connected to a board having a USB port. Such aboard may form the vision controller 165 or the main controller as thecase may be. Accordingly, it is very important to keep the couplingbetween the wireless LAN card and the board. When the wireless LAN card192 is decoupled from the board, the communication between the robotcleaner and the external terminal is impossible. The coupling structurewill be described in detail later.

Meanwhile, the NFC module 198 may be configured only to recordinformation simply and it may be provided only with the required power.As shown in FIG. 4, the NFC module 198 needs not be directly connectedto the main controller 160 or the vision controller 165. In other words,the NFC module 198 may exclude communication with the main controller160, the vision controller 165 and the Wi-Fi module 190. Accordingly,the robot cleaner having the NFC module 198 may be provided easily.

FIG. 4 illustrates one example of the NFC module 198 provided with onlythe power by the main controller 160 via the camera module 195.

The robot cleaner 100 according to this embodiment may include a secondwireless communication unit 180 which is distinguished from the Wi-Fimodule 190 and the NFC module 198 mentioned above. The second wirelesscommunication unit 180 may be also provided for short range wirelesscommunication.

The second wireless communication unit 180 may include a module whereshort range communication may be performed. Examples of the short rangecommunication include Bluetooth, RFID (Radio Frequency Identification),IrDA (Infrared Data Association), UWB (Ultra Wideband) and ZigBee.

The second wireless communication unit 180 may be provided for shortrange wireless communication with a recharging base (not shown) of therobot cleaner.

Next, referring to FIGS. 5 through 7, an example of the externalterminal 200 for remote controlling the robot cleaner will be described.Hereinafter, it can be said that such the robot cleaner and the externalterminal compose a robot cleaner system.

FIG. 5 is a block diagram of the external terminal composing the robotcleaner system according to one embodiment of the disclosure.

The external terminal 200 in the present disclosure is a deviceremote-accessible to the robot cleaner 100 to control the driving of therobot cleaner 100. Examples of the external terminal may include a smartphone, PDA (Personal Digital Assistant) and PMP (Portable MultimediaPlayer).

For convenient explanation of the disclosure, a smart phone is used asthe external terminal 200 of the robot cleaner 100.

The external terminal 200 may include a wireless communication unit 210,AV (Audio/Video) input unit 220, a user input unit 230, an output unit240, a memory 250, an interface unit 260, a terminal controller 270 anda power supply unit 280. The components shown in FIG. 5 are notnecessarily provided and an external terminal 200 having more or lesscomponents may be realized.

Each of the components will be described in order.

The wireless communication unit 210 (a second wireless communicationunit) may include one or more modules that enables wirelesscommunication between wireless communication systems or wirelesscommunication between the external terminal 200 and a network in whichthe external terminal 200 is located. For example, the second wirelesscommunication unit 210 may include a mobile communication module 211, awireless internet module 212 and a short range communication module 213.

The mobile communication module 211 transmits and receives a wirelesssignal to and from one or more of a base station, an external terminal aserver on a mobile communication network. Such a wireless signal mayinclude various types of data in accordance with transmission/receivingof a voice call signal, a video call signal or a texture/multimediamessage.

The wireless internet module 212 is a module for wireless internet linkand it may be an internal or external element of the external terminal200. Examples of wireless internet technologies may include WLAN(Wireless LAN) (Wi-Fi), WiBro (Wireless Broadband), WiMax (WorldInteroperability for Microwave Access) and HSDPA (High Speed DownlinkPacket Access). In this instance, the wireless internet module 212 maybe a Wi-Fi module and such a Wi-Fi module may access to AP of the robotcleaner mentioned above and enable Wi-Fi communication between theexternal terminal 200 and the robot cleaner 100.

The short range communication module 213 is a module for short rangecommunication. Examples of short range communication may includeBluetooth, RFID (Radio Frequency Identification), IrDA (Infrared DataAssociation), UWB (Ultra Wideband), ZigBee or NFC (Near FieldCommunication). In this instance, the short range communication module213 may be a NFC module for performing NFC communication with the NFCmodule of the robot cleaner mentioned above. Accordingly, the user maylocate the external terminal 200 near the robot cleaner and receive APinformation via NFC communication.

Referring to FIG. 5, the A/V input unit 220 is for inputting an audiosignal or a video signal and it may include a camera 221 and amicrophone 222. The camera 221 processes image frames of a video file ora still image gained by an image sensor in a video call mode or cameramode. The processed image frame may be displayed on a display 241.

The image frame processed by the camera 221 may be stored in the memory250 or transmitted to an external device via the second wirelesscommunication unit 210. Two or more cameras 221 may be provided inaccordance with a service environment.

The microphone 222 converts an external audio signal received from theoutside into electric voice data in a call or record mode and a voicerecognition mode. In the call mode, the processed voice data may beconverted into a transmittable signal and output to a mobilecommunication base station by the mobile communication module 211. Inthe microphone 222 may be realized various types of noise rejectionalgorisms for reflecting the noise generated while receiving theexternal audio signal.

The user input unit 230 generates data for the user to control theoperation of the external terminal 200. The user input unit 230 mayconsist of a key pad, a dome switch, a touch pad (staticpressure/capacitive type), a jog wheel and a jog switch.

The output unit 240 may generate output associated with visual, auditoryor tactual sense. The output unit 240 may include a display 241, anaudio output module 242, an alarm unit 243 and a haptic module 244.

The display 241 displays, in other words, outputs the informationprocessed in the external terminal 200. For example, the display 241 maydisplay UI (User Interface) or a GI (Graphic User) interface associatedwith a call when the external terminal 200 is in a call mode. When theexternal terminal 200 is a video call mode or a camera mode, the display241 may display photographing and/or received image or UI and GUI.

The display 241 may include at least one of a liquid crystal display(LCD), a thin film transistor liquid crystal display (TFT LCD), anorganic light emitting diode (OLED), a flexible display and a 3Ddisplay.

Two or more displays 241 may be provided in accordance with a realizingtype of the external terminal 200. For example, a plurality of displays241 may be arranged in one surface at intervals or integrally, or theymay be arranged in different surfaces, respectively.

When the display 241 and a sensor for sensing touch input (hereinafter,‘a touch sensor’) form a layer structure (hereinafter, ‘a touchscreen’), the display 241 may be used as an input device as well as anoutput device. The touch sensor may have a touch film, a touch sheet anda touch pad.

The touch sensor may be configured to convert a pressure applied to aspecific point of the display 241 or change in capacitances generated ina specific point into an electric input signal. The touch sensor maydetect a position of input touch and an area of the input touch. Also,it may detect a pressure applied in the touch input.

When the touch input is sensed by the touch sensor, a signal(s)corresponding to the touch may be transmitted to a touch controller. Thetouch controller processes the signal(s) and transmits datacorresponding to the signal(s) to the terminal controller 270. Afterthat, the terminal controller 270 may the terminal controller 270 maydetermine which point is touched on the display 241.

The audio output unit 242 may output audio data received from the secondwireless communication unit 210 or stored in the memory 250 in callsignal receiving, a call or record mode, a voice recognizing mode and abroadcasting receive mode. The audio output unit 242 may output an audiosignal associated with functions performed by the external terminal 200(e.g., a call signal receiving sound and a message receiving sound).Such the audio output unit 242 may include a receiver, a speaker and abuzzer.

The alarm unit 243 outputs signal for notifying event generation of theexternal terminal 200. Examples of the event generated in the externalterminal 200 may include call signal receiving, message receiving, keysignal input and touch input. The alarm unit 243 may also output anothertype signal rather than the video or audio signal. The alarm unit 243may output a vibration signal for notifying the event generation. Thevideo or audio signal may be output even via the display 241 or theaudio output module 242 and both of the display 241 and the audio outputmodule 242 may be categorized as the alarm unit 243.

The haptic module 244 generates various tactile or haptic effects sensedby the user. A typical example of the haptic effects generated by thehaptic module 244 may be vibration. Intensity and a pattern of thevibration generated by the haptic module 244 may be controllable. Forexample, different vibrations may be compounded and output or they maybe sequentially output.

The memory 250 may store a program for operating the terminal controller270 or temporarily store input/output data (e.g., a phone book, amessage, a still image and a motion picture) therein. The memory 250 maystore various patterned vibrations and sounds output after the touchinput.

The memory 250 may include at least one of storage medium including aflash memory type, a hard disk type, a multimedia card micro type, acard type memory (e.g., a SD or XD memory), RAM (Random Access Memory),SRAM (static Random Access Memory), PROM (Programmable Read-OnlyMemory), MRAM (Magnetic Random Access Memory), a magnetic disk and anoptical disk. The external terminal 200 may be operated in associationwith a web storage performing a storage function of the memory 250 on aninternet

The interface unit 260 may be employed as a passage to all of theexternal devices connected with the external terminal 200. The interface260 may be provided with data or the power by the external devices andtransmit the data or power to each of the elements or transmit data ofthe external terminal 200 to the external device. for example, theinterface unit 260 may include a wire/wireless headset port, an externalcharger port, a wire/wireless data port, a memory card port, a port forconnecting a device having an identify module, an audio I/O(Input/output) port, a video I/O port and an earphone port.

The identify module is a chip storing a variety of information thereinto identify an authority for use of the external terminal 200. Theidentification module may include SIM (Subscriber Identify Module) andUSIM (Universal Subscriber Identity Module). A device having theidentify module (hereinafter, “identify device”) may be fabricated to bea smart card. Accordingly, the identify device may be connected to theexternal terminal 200 via a port.

The terminal controller 270 typically controls an overall operation ofthe remote control device. For example, the terminal controller 270performs control and process associated with voice call, datacommunication and video call. The terminal controller 270 may include amultimedia module 271 for playing multimedia. The multimedia module 271may be realized in the terminal controller 270 or separately realized.

The terminal controller 270 may process pattern recognition forrecognizing handwriting input or drawing input performed on a touchscreen as characters and images.

The power supply unit 280 may be provided with an external power orinternal power in accordance with the control of the controller 270 andsupply a power required by the operation of the components.

The embodiment of the present disclosure may be realized in a computeror readable media similar to the computer, using software, a hardware orcombination of the software and the hardware.

In hardware realization, the embodiments described herewith may berealized by using at least one of ASICs (Application Specific IntegratedCircuits), DSPs (Digital Signal Processors), DSPDs (Digital SignalProcessing Devices), PLDs (Programmable Logic Devices), FPGAs (FieldProgrammable Gate Arrays), processors, controllers, micro-controllers,microprocessors and electric units for performing other functions. Insome cases, the embodiments may be realized by the terminal controller270.

In software realization, embodiments such as processes and functions maybe realized together with an auxiliary software module performing one ormore functions or operations. A software code may be realized by asoftware application written in a proper program language. The softwarecode may be stored in the memory 250 and performed by the terminalcontroller 270. The application may include a specific application forcontrolling the robot cleaner 100 mentioned above.

FIG. 6 is a front perspective diagram of the remote control devicecomposing the robot cleaner system according to one embodiment of thedisclosure, seen in front.

The external terminal 200 described above includes a bar-shaped body andthe embodiments are not limited thereto. The remote control device maybe a slide type, a folder type, a swing type and a swivel type, with twoor more bodies relative-movably coupled to each other.

The body includes a case (e.g., a casing, a housing and a cover) fordefining an exterior appearance of the external terminal 200. In thisembodiment, the case may be divided into a front case 201 and a rearcase 202. Various electronic components are mounted in a space formedbetween the front case 201 and the rear case 202. One or moreintermediate cases may be additionally arranged between the front case201 and the rear case 202.

The cases may be injection-molded of synthetic resin or they may beformed of a metallic material (e.g., stainless steel (STS) and titanium(Ti)).

In the body of the external terminal 200, mainly, in the front case 201may be arranged the display 241, the audio output unit 242, the camera221, the input units 230/231 and 232, the microphone 222 and theinterface 160.

The display 241 occupies most of a main surface possessed by the frontcase 201. The audio output unit 242 and the camera 221 may be arrangedadjacent to one of ends of the display 241. The input unit 231 and themicrophone 222 may be arranged adjacent to the other end. The input unit232 and the interface 160 may be arranged in lateral surfaces of thefront and rear cases 201 and 202.

The user input unit 230 may be operated by the user to receive an inputcommand for controlling the operation of the external terminal 200. Theuser input unit 230 may include a plurality of manipulating units 231and 232. The manipulating units 231 and 232 may be called as amanipulating portion. Any tactile manners in which the user manipulates,with a tactile sense may be applied.

The contents input by the first or second manipulating units 231 and 232may be set in various manners. For example, the first manipulating unit231 receives an input command (e.g., a start command, an end command anda scroll command). The second manipulating unit 232 may receive an inputcommand (e.g., controlling of a sound output from the audio output unit242 and conversion into a touch recognition mode of the display 241).

FIG. 7 is a rear perspective diagram of the remote control devicecomposing the robot cleaner according to one embodiment of thedisclosure.

Referring to FIG. 7, a camera 221′ may be additionally mounted in a rearsurface of the body possessed by the external terminal 200, in otherwords, in the rear case 202. The camera 221′ may have a photographingdirection substantially opposite to a photographing direction of thecamera (221, see FIG. 6) and it may have pixels different from thepixels of the camera 221.

For example, the camera 221 may have low pixels which cause no problemsin transmitting a photograph of the user's face to the other opponent ona video call. The camera 221′ may have high pixels because it is oftennot to transmit a conventional object immediately after photographing.The camera 221′ may be coupled to the body of the external terminal 200with rotatable or being able to pop up.

A flash 123 and a mirror 124 may be additionally arranged adjacent tothe camera 221′. The flash 123 flashes a light upon an object when thecamera 221′ photographs an object. The user may reflect the face in themirror 124 when trying to photograph himself or herself (in other words,self-photograph).

An audio output unit 242′ may be additionally arranged in a rear surfaceof the body possessed by the external terminal 200. The audio outputunit 242′ may realize a stereo function, together with the audio outputunit (242, see FIG. 6). The audio output unit 242′ may be used inrealizing a speaker phone during the call.

A power supply unit 280 may be mounted to the body of the externalterminal 200 to supply a power to the external terminal 200. The powersupply unit 280 may be mounted in the body of the external terminal 200or directly and detachably coupled to an outer surface of the bodypossessed by the external terminal 200.

Hereinafter, referring to FIG. 8, a robot cleaner system according toone embodiment of the present disclosure will be described.

As shown in the drawing, the robot cleaner system may include a robotcleaner 100 and an external terminal 200.

The robot cleaner 100 and the external terminal 200 may be equal to orsimilar to the robot cleaner and the external terminal 200 mentionedabove.

First of all, the external terminal 200 may be located in a specificposition over the robot cleaner 100. Not even in contact, the externalterminal 200 is located in a preset range of distances. The APinformation of the robot cleaner 100 may be transmitted to the externalterminal 200 via the NFC module of the robot cleaner 100 easily. Inother words, even if not recognizing or memorizing the AP information,the user may locate the external device 200 near the robot cleaner 100and the AP information may be transmitted to the external terminal 200.

It may be preferable that a specific position of the robot cleaner 100is the position where the NFC module of the robot cleaner 100 ismounted. The specific position may be an upper surface of the robotcleaner 100, for the user to locate the external terminal 100 in thespecific position easily. Accordingly, a NFC tag antenna of the NFCmodule may be located toward an upper surface of the robot cleaner.

Hereinafter, referring to FIGS. 9 through 12, the mounting structure ofthe NFC module 198 and the Wi-Fi module 190 in the robot cleaner 100will be described in detail.

In FIG. 9, a rear surface of the upper cover 300 provided in the robotcleaner is shown. The upper cover 300 may form the upper surface of therobot cleaner 100. Accordingly, the structure of the upper cover 300 maybe the structure in which the user can approach most easily and whichforms the outer surface of the robot cleaner, especially, an uppersurface of the robot cleaner.

First of all, referring to FIGS. 9 through 12, a mounting structure ofthe NFC module will be described in detail.

The NFC module may be formed of a board and a NFC Tag antenna may beformed in the NFC module. The antenna may be mounted in the rear surfaceof the upper cover 300 to face the upper surface of the robot cleaner100. The NFC module 198 may be mounted through a hook 199 formed in theupper cover 300.

The upper cover 300 may be formed of a plastic molding and it is not sothick. Accordingly, a distance between the NFC module 198 and an outersurface of the upper cover 300 is not so far. For example, the distancemay be within 10 mm. In other words, the NFC module 198 may be locatedin the outer surface of the upper cover 100 deep within 10 mm.

Even without a metallic material disposed between the NFC module 198 andthe upper cover, a quite short distance may be kept. That means that thecommunication between the external terminal and the NFC module 198 maybe performed very easily. Only when the external device is located onlyto a position having a preset distance near the upper cover, the NFCcommunication may be performed. Accordingly, damage to the upper coveror the surface of the external terminal caused by the contact may beprevented.

Meanwhile, the upper cover may have a central portion convex upward.Accordingly, both ends of the upper cover 300 have a height differentfrom a height of the NFC module. Such a height difference may form adistance between the NFC module and the components of the robot cleanerlocated under the NFC module.

Accordingly, a front surface of the NFC module 198 may be as close aspossible to an outer surface of the robot cleaner and a distance betweenthe rear surface and the other components of the robot cleaner may besecured. That means noise causing elements of the NFC communication canbe reduced remarkably. That is because the metallic material near theNFC module, especially, the antenna may have a bad influence on the NFCcommunication.

In FIG. 12, the suction device 120 is shown. The suction device 120 maybe mounted in the case 110. Accordingly, FIG. 12 illustrates a locationrelation between the NFC module 198 and the suction device 120 in astate where the robot cleaner is completely assembled.

The suction device 120 may include a metallic blade. The minimumdistance has to be secured between the blade and the NFC module 198sufficiently. That is because noise of NFC communication can be causedby the blade.

As mentioned above, the NFC module is mounted in the upper cover havinga central portion convex upward, especially, in front or behind theupper cover. The suction device 120 may be mounted in the case 110coupled to a lower portion of the upper cover 300.

Hereinafter, referring to FIGS. 9 through 11, the mounting structure ofthe Wi-Fi module 190 will be described in detail.

As shown in the drawing, a wireless LAN card 190 may be realized as theWi-Fi module 190 and a required board may be vision controller 165.Accordingly, the LAN card 190 may be mounted in the vision controller165.

A distance between the wireless LAN card 190 and the main controller 160may be 100 mm or less to reduce communication noise. The wireless LANcard 190 may be mounted in the rear surface of the upper cover 300 likethe NFC module 198 mentioned above.

Specifically, a user UI may be provided in front of or behind the uppercover 300. Accordingly, the main controller 160 may be in front of orbehind the upper cover 300. The NFC module 198 may be mounted behind orin front of the upper cover 300 which is the opposite position of thewireless LAN card 190.

The wireless LAN card 190 may be a USB dongle type such that thewireless LAN card 190 may be insertedly coupled to a USB port 167 formedin the board. Such a structure may prevent the wireless LAN card 190from being decoupled from the board.

Meanwhile, the board composing the vision controller 165 may be alsosecured to the upper cover 300 stably, as well as the board composingthe wireless LAN card 190. The vision controller 165 may be coupled tothe main controller 160 in a direction where the vision controller 165is coupled.

Referring to FIGS. 10 and 11, a coupling relation among the wireless LANcard 190, the board and the upper cover will be described in detail.

First of all, the board, for example, a board 166 composing the visioncontroller 165 may be provided vertically and a USB port 167 may beformed perpendicular to the board 166, in other words, in a horizontaldirection.

As the wireless LAN card 190 moves in a direction where it is coupled tothe USB port 167 such that the wireless LAN card 190 and the USB port167 may be coupled to each other and that the wireless LAN card 190 andthe board 166 may integrally move.

Such the motion may allow the wireless LAN card 190 coupled to the board166. Alternatively, the board 166 may be coupled to the main controller160.

A short edge may be formed to restrict the motion of the board and thewireless LAN card 190. In other words, the short edge 310 may be formedin a rear surface of the upper cover 300 to restrict the horizontalmotion. As the board is pushed to move to the short edge 310, thecoupling between the wireless LAN card 190 and the board may becompleted. Also, the coupling between the board and the main controllermay be completed.

Meanwhile, the coupling between the board and the wireless LAN card 190requires secure fixing. In other words, the longitudinal motion orrotation needs to be prevented. Accordingly, a hook 320 may be formed tosecure the board and the wireless LAN card integrally coupled to eachother. The hook 320 may be formed in the rear surface of the upper cover300 to fix the board and the wireless LAN card integrally. The pluralityof the hooks 320 may be provided, which will be described in detaillater.

When the wireless LAN card 190 is moved in a direction to be coupled tothe USB port 167 as shown in FIG. 10, board hooks 321 and 322 may beformed in both sides of the board. The board hooks may fix both sides ofthe board. When the board is moved to the short edge 310, the board maybe coupled to the board hooks. Accordingly, the board may be preventedfrom rotating by the board hooks.

Meanwhile, when the board and the board hooks are coupled to each otheras shown in FIG. 11, the wireless LAN card may be coupled to a wirelessLAN card hook 323.

The wireless LAN hook 323 may be a hook 323 to couple the wireless LANcard moving downward thereto. The wireless LAN card hook 323 may beblock a rear portion of the wireless LAN card 190.

Accordingly, when the wireless LAN card is coupled to the board via thehooks, the rotation and forward-and-backward motion thereof may beprevented.

Specifically, at least three or more hooks 320 may be provided and suchhooks may form three or more supporting spots. For examples, thesupporting spots may form a triangle.

The forward-and-backward motion may be prevented by the short edge 310and the wireless LAN card hook 323. The rotation may be prevented by theboard hooks 321 and 322. In other words, the wireless LAN card and theboard integrally coupled to each other may be prevented from moving androtating.

Even when a shock is applied to the robot cleaner, the wireless LAN card190 may be prevented from separating from the board. Also, the board 166may be prevented from separating from the main controller effectively.

The coupling direction between the USB type wireless LAN card and theUBS port may be realized as substantially horizontal. That means that alongitudinal direction of the wireless LAN card is a horizontaldirection. Accordingly, the height of the robot cleaner may be preventedfrom increasing. The coupling between the wireless LAN card and theboard and the fixing structure of the two elements to the upper covercan be performed easily.

Hereinafter, a control method of the robot cleaner through the externalterminal will be described.

The robot cleaner has to communicate the external terminal to becontrolled through the external terminal by the user. The robot cleanermay provide a self AP function. The external terminal has to have the APinformation to access to the AP.

Accordingly, to transmit the AP information to the external terminaleasily, the robot cleaner may transmit the AP information of the Wi-Fimodule embedded in the case to the external device through the NFCmodule.

The external terminal transmits the AP information to the robot cleanerand the robot cleaner may authenticate the external terminal based onthe AP information received from the external terminal. In other words,the external terminal connects to the AP.

When the access and the authentication are performed, the robot cleanermay Wi-Fi communicate with the external terminal. In other words, theboth may Wi-Fi communicate with each other via the AP provided by therobot cleaner itself. Remote control of the robot cleaner may beperformed on the external terminal via such the Wi-Fi communication.

The control of the robot cleaner through the steps means that the usercan directly control the robot cleaner nearby, in other words, in anarea where Wi-Fi communication can be performed via the AP of the robotcleaner. For example, the control of the robot cleaner may be performedin the area recognized by the user.

Accordingly, the other person is prevented from controlling the robotcleaner discretionarily. Also, even if the other person controls therobot cleaner discretionarily, the user can find the other person'scontrol easily.

Meanwhile, the AP information of the robot cleaner may be transmitted tothe external terminal only when the user approaches the externalterminal near the robot cleaner. In other words, the transmission of theAP information from the robot cleaner to the external terminal may beperformed in the range of the areas recognized by the user. In manycases except the case of the other person's trespassing on the house,the user may receive the information and the information may betransmitted at least under the user's eyes.

The robot cleaner may be controlled in the range of the areas recognizedby the user and the user may control the robot cleaner easily at thesame time. In other words, only when the external terminal is locatednear the robot cleaner very simply, the robot cleaner and the externalterminal can communicate with each other. Specifically, troublesome andcomplex manual AP input may be excluded.

In this instance, the control of the robot cleaner through the externalterminal may include remote controlling and/or monitoring via stateinformation of the robot cleaner. Such the control may be performed viathe Wi-Fi communication mentioned above.

Hereinafter, a control method of the robot cleaner system including theexternal terminal and the robot cleaner will be described.

First of all, to control the robot cleaner through the externalterminal, the information on the robot cleaner has to be stored in theexternal terminal. That is because a specific robot cleaner iscontrolled through the external terminal, in other words, a controlobject has to be specified.

The specification of the control object may be performed based on therobot cleaner information and such the robot cleaner information mayinclude AP information. That may be the information on the self APprovided by the robot cleaner. Such the AP information is specificinformation and the robot cleaner as the control object may bespecified.

A step of storing the robot cleaner information stored in the externalterminal may be performed through the communication between the NFCmodule of the external terminal and the NFC module of the robot cleanerhaving the recorded robot cleaner information which includes informationof the Wi-Fi module embedded in the case of the robot cleaner.

The robot cleaner information may include a plurality of pieces, becausea plurality of robot cleaners can be provided in a house rarely. Theuser may select information on a specific robot cleaner or a menudisplaying the information of the specific robot cleaner, to specify arobot cleaner as a control object. In other words, a step of selecting arobot cleaner as a remote control object based on the receivedinformation of the robot cleaner may be performed.

When the user selects a robot cleaner as a control object through theexternal terminal, the external terminal transmits AP information to therobot cleaner. In other words, the external terminal tries to access tothe robot cleaner. The robot cleaner authenticates the external terminalbased on the received AP information to allow Wi-Fi communication withthe external terminal.

After the access and the authentication, the Wi-Fi modules of the twomay perform the Wi-Fi communication. The control of the robot cleanermay be performed by the user via the Wi-Fi communication, using theexternal terminal.

Accordingly, in the embodiment of the present disclosure may be providedthe robot cleaner and the robot cleaner system, which includes the NFCmodule performing relatively short range communication for instantcommunication and the Wi-Fi module for performing relatively remoterange communication for continuous communication in controlling.

Also there may be provided the robot cleaner and the robot cleanersystem, which may perform independent positions and coupling as well asindependent controlling and signal processing. Accordingly, the robotcleaner and the robot cleaner system including such the modules maybeprovided easily. The communication or signal processing between the twomodules may not be required such that a control logic structure cannotbe complex.

Exemplary embodiments of the disclosed subject matter are describedherein with reference to cross-region illustrations that are schematicillustrations of idealized embodiments (and intermediate structures) ofthe disclosed subject matter. As such, variations from the shapes of theillustrations as a result, for example, of manufacturing techniquesand/or tolerances, are to be expected. Thus, exemplary embodiments ofthe disclosed subject matter should not be construed as limited to theparticular shapes of regions illustrated herein but are to includedeviations in shapes that result, for example, from manufacturing.

Exemplary embodiments of the present disclosure provide a robot cleanerand overcome the disadvantages of the robot cleaner and the robotcleaner system mentioned above.

Exemplary embodiments of the present disclosure also provide a robotcleaner of which a cleaning history (e.g., an area where the robotcleaner cleaned and a moving path of the robot cleaner) may be easilyfigured out by a user and a robot cleaner system including the same.

Exemplary embodiments of the present disclosure also provide a robotcleaner of which a cleaning history may be recognized by the uservisually and which plays a video file type cleaning history to enhanceuser satisfaction, and a robot cleaner system including the same.

Exemplary embodiments of the present disclosure also provide a robotcleaner which may be used conveniently with no auxiliary device forwireless communication except a cleaner and an external terminal,regardless of an installation environment, and a robot cleaner systemincluding the same.

Exemplary embodiments of the present disclosure also provide a robotcleaner of which a Wi-Fi module may be coupled and secured easily andwhich may perform NFC communication easily via the NFC module, and arobot cleaner system including the same.

Exemplary embodiments of the present disclosure also provide a robotcleaner which includes a communication module as a prerequisite forcommunication for control and which may be realized easily, with easyusage, and a robot cleaner system including the same.

To achieve these objects and other advantages and in accordance with thepurpose of the disclosure, as embodied and broadly described herein, arobot cleaner includes a case; a suction device provided in the case; asuction nozzle for sucking dust from a floor by driving of the suctiondevice; a dust collection device for collecting foreign substancescontained in the air sucked via the suction nozzle; a wheel unit forallowing the case to drive automatically; a main controller forcontrolling the driving of the suction device and the wheel unit; aWi-Fi module provided in the case to provide Access Point (AP); and aNFC module provided in the case to provide AP information for accessingto the AP through NFC communication, wherein the AP information receivedfrom the external terminal is authenticated to allow the robot cleanerto Wi-Fi communicate with the external terminal.

The Wi-Fi module may provide the main controller with a control signalreceived from the external terminal and provides the external terminalwith state information of the robot cleaner.

The Wi-Fi module and the NFC module may be provided in the caseindividually, spaced apart a preset distance from each other.

The AP information may include AP SSID and a security key.

Communication between the Wi-Fi module and the NFC module may beexcluded and only power supply to the NFC module is controlled by themain controller.

The robot cleaner may further include a camera module provided in thecase to capture an environmental view thereof; and a vision controllerfor generating location information based on the image informationgenerated in the camera module, wherein the Wi-Fi module is mounted inthe vision controller.

The Wi-Fi module may communicate with the vision controller via serialcommunication, and the vision controller may communicate with the maincontroller via serial communication.

The Wi-Fi module may communicate with the vision controller via USBserial communication. Accordingly, the Wi-Fi module may be realizedeasily.

The case may include an upper cover for defining an upper exteriorappearance of the robot cleaner, and the NFC module is mounted in a rearsurface of the upper cover.

The Wi-Fi module may be provided in front or behind the rear surface ofthe upper cover, and the NFC module may be provided behind or in frontof the upper cover which is an opposite position of the Wi-Fi module.

The Wi-Fi module may include an USB type wireless LAN card, and in therear surface of the upper cover, a board hook for fixing the board asthe wireless LAN card and the board may be moved in a direction wherethe wireless LAN card is coupled to the board; and a wireless LAN cardhook for fixing the wireless LAN card as the wireless LAN card may bemoved downward, after the board is coupled to the board hook.

The board hook may be formed in each of right and left ends of theboard, and the wireless LAN card may be formed in a portion where theleft and right board hooks form a triangle, and the Wi-Fi module may besecured to the upper cover by the board hook and the wireless LAN cardhook, with at least three supporting spots, in a state where thewireless LAN card and the board are integrally coupled to each other.

Exemplary embodiments of the present disclosure also provide a robotcleaner including a case comprising an upper cover for defining an upperexterior appearance of the robot cleaner; a suction device provided inthe case; a dust collection device for collecting foreign substancescontained in the air sucked via the suction nozzle; a wheel unitprovided to drive the case automatically; a main controller forcontrolling the driving of the suction device and the wheel unit; aWi-Fi module comprising a wireless LAN card for providing Access Point(AP) and a board connected to the wireless LAN card, the Wi-Fi modulecoupled to a rear surface of the upper cover in a state of beingconnected to the board; and a NFC module coupled to the rear surface ofthe upper cover in an opposite position of the Wi-Fi module, the NFCmodule for providing AP information for accessing to the AP via NFCcommunication to an external terminal, wherein the AP informationreceived from the external terminal is authenticated to allow the robotcleaner to Wi-Fi communicate with the external terminal.

At least three or more hooks may be formed in the upper cover to securethe Wi-Fi module.

The hooks may include a board hook for fixing the board as the wirelessLAN card and the board are moved in a direction (a forward direction)where the wireless LAN card is connected to the board; and a wirelessLAN card hook for fixing the wireless LAN card as the wireless LAN cardis moved downward after the board is coupled to the board hook.

The hooks may include a front hook for restricting forward-and-backwardmotion of the wireless LAN card and the board; and at least two lateralhooks for restricting lateral motion of the wireless LAN card and theboard.

The front hook may be the wireless LAN card hook and the lateral hookmay be the board hook.

Exemplary embodiments of the present disclosure may also provide acontrol method of a robot cleaner including transmitting AP informationof a Wi-Fi module embedded in a case of the robot cleaner to an externalterminal via a NFC module; allowing the external terminal to access tothe AP based on the AP information received from the external terminal;and Wi-Fi communicating with the external terminal via the AP.

In the communicating step, remote control of the robot cleaner throughthe external terminal and/or monitoring of state information on therobot cleaner may be performed.

Communication between the Wi-Fi module and the NFC module may beexcluded, and only power supply to the NFC module may be controlled bythe main controller.

Exemplary embodiments of the present disclosure may also provide acontrol method of a robot cleaner system comprising a robot cleaner andan external terminal for wirelessly communicating with the robotcleaner, the control method including storing information on the robotcleaner in the external terminal via communication between an NFC moduleof the external terminal and an NFC module of the robot cleaner, whereinformation on the robot cleaner comprising AP information of a Wi-Fimodule embedded in a case of the robot cleaner is recorded; selecting arobot cleaner as a remote control object through the external terminalbased on the received information on the robot cleaner; accessing to theAP by allowing the external terminal to transmit the AP information tothe selected robot cleaner; and performing Wi-Fi communication between aWi-Fi module of the robot cleaner and a Wi-Fi module of the externalterminal.

Exemplary embodiments of the present disclosure also provide a robotcleaner of which a cleaning history (e.g., an area where the robotcleaner cleaned and a moving path of the robot cleaner) may be easilyfigured out by a user and a robot cleaner system including the same.

Exemplary embodiments of the present disclosure also provide a robotcleaner of which a cleaning history may be recognized by the uservisually and which plays a video file type cleaning history to enhanceuser satisfaction, and a robot cleaner system including the same.

Exemplary embodiments of the present disclosure also provide a robotcleaner which may be used conveniently with no auxiliary device forwireless communication except a cleaner and an external terminal,regardless of an installation environment, and a robot cleaner systemincluding the same.

Exemplary embodiments of the present disclosure also provide a robotcleaner of which a Wi-Fi module may be coupled and secured easily andwhich may perform NFC communication easily via the NFC module, and arobot cleaner system including the same.

Exemplary embodiments of the present disclosure also provide a robotcleaner which includes a communication module as a prerequisite forcommunication for control and which may be realized easily, with easyusage, and a robot cleaner system including the same.

Any reference in this specification to “one embodiment,” “anembodiment,” “example embodiment,” etc., means that a particularfeature, structure, or characteristic described in connection with theembodiment is included in at least one embodiment of the disclosure. Theappearances of such phrases in various places in the specification arenot necessarily all referring to the same embodiment. Further, when aparticular feature, structure, or characteristic is described inconnection with any embodiment, it is submitted that it is within thepurview of one skilled in the art to effect such feature, structure, orcharacteristic in connection with other ones of the embodiments.

Although embodiments have been described with reference to a number ofillustrative embodiments thereof, it should be understood that numerousother modifications and embodiments can be devised by those skilled inthe art that will fall within the spirit and scope of the principles ofthis disclosure. More particularly, various variations and modificationsare possible in the component parts and/or arrangements of the subjectcombination arrangement within the scope of the disclosure, the drawingsand the appended claims. In addition to variations and modifications inthe component parts and/or arrangements, alternative uses will also beapparent to those skilled in the art.

What is claimed is:
 1. A robot cleaner comprising: a case; a suctiondevice provided in the case; a suction nozzle configured to suck dustfrom a floor by driving of the suction device; a dust collection deviceconfigured to collect foreign substances contained in the air sucked viathe suction nozzle; a wheel unit configured to allow movement of therobot cleaner; a main controller configured to control the driving ofthe suction device and the wheel unit; a Wi-Fi module provided in thecase and configured to provide an Access Point (AP); and a NFC moduleprovided in the case and configured to provide an external terminal withAP information for access to the AP through NFC communication, whereinwhen the AP information received from the external terminal isauthenticated, a Wi-Fi communication between an external terminal andthe main controller is enabled.
 2. The robot cleaner of claim 1, whereinthe Wi-Fi module provides the main controller with a control signalreceived from the external terminal and provides the external terminalwith state information of the robot cleaner.
 3. The robot cleaner ofclaim 1, wherein the Wi-Fi module and the NFC module are separatelyprovided in the case, and are spaced apart from each other by a presetdistance.
 4. The robot cleaner of claim 1, wherein the AP informationcomprises AP SSID and a security key.
 5. The robot cleaner of claim 1,wherein when communication of the Wi-Fi module and the NFC module is notenabled, power to the NFC module is provided through the maincontroller.
 6. The robot cleaner of claim 1, further comprising: acamera module provided in the case to provide surrounding view thereof;and a vision controller configured to generate location informationbased on information of surrounding view generated by the camera module,wherein the Wi-Fi module is mounted with the vision controller.
 7. Therobot cleaner of claim 6, wherein the Wi-Fi module communicates with thevision controller via serial communication, and the vision controllercommunicates with the main controller via serial communication.
 8. Therobot cleaner of claim 7, wherein the Wi-Fi module communicates with thevision controller via USB serial communication.
 9. The robot cleaner ofclaim 1, wherein the case comprises an upper cover configured to definean upper exterior appearance of the robot cleaner, and the NFC module ismounted in a rear surface of the upper cover.
 10. The robot cleaner ofclaim 9, wherein the Wi-Fi module is provided in front or behind therear surface of the upper cover, and the NFC module is provided behindor in front of the rear surface of the upper cover which is an oppositeposition of the Wi-Fi module.
 11. The robot cleaner of claim 9, whereinthe Wi-Fi module comprises an USB type wireless LAN card, and wherein aboard hook and a wireless LAN card hook are provided in the rear surfaceof the upper cover, the board hook being configured to fix the board asthe wireless LAN card and the board are moved in a direction where thewireless LAN card is coupled to the board; and the wireless LAN cardhook being configured to fix the wireless LAN card as the wireless LANcard is moved downward after the board is coupled to the board hook. 12.The robot cleaner of claim 11, wherein the board hook includes right andleft hooks, and the wireless LAN card is fixed in position in a firstdirection by the left and right hooks, and fixed in position in a seconddirection by the wireless LAN card hook.
 13. A robot cleaner comprising:a case including an upper cover serving as an upper exterior appearanceof the robot cleaner; a suction device provided in the case; a dustcollection device configured to collect foreign substances contained inthe air sucked via the suction device; a wheel unit provided to allowmovement of the robot cleaner; a main controller configured to controlthe suction device and the wheel unit; a Wi-Fi module including awireless LAN card configured to provide an Access Point (AP) and thewireless LAN card connect to a board mounted at a rear surface of theupper cover; and a NFC module coupled at the rear surface of the uppercover in an opposite position of the Wi-Fi module, the NFC module forproviding AP information for accessing to the AP via NFC communicationfor an external terminal, wherein when the AP information received fromthe external terminal is authenticated, Wi-Fi communication with anexternal terminal is enabled.
 14. The robot cleaner of claim 13, whereinat least three hooks are formed in the upper cover to secure the Wi-Fimodule.
 15. The robot cleaner of claim 14, wherein the hooks comprise, aboard hook configured to fix the board as the wireless LAN card and theboard are moved in a first direction, where the wireless LAN card isconnected to the board; and a wireless LAN card hook configured to fixthe wireless LAN card in a second direction after the board is coupledto the board hook in the first direction.
 16. The robot cleaner of claim14, wherein the hooks comprise, a front hook configured to restrictforward-and-backward motion of the wireless LAN card and the board; andat least two lateral hooks configured to restrict lateral motion of thewireless LAN card and the board.
 17. A control method of a robot cleanercomprising: transmitting AP information of a Wi-Fi module embedded in acase of the robot cleaner to an external terminal via a NFC module;allowing the external terminal to access to the AP based on the APinformation received from the external terminal; and Wi-Fi between theexternal terminal and the robot cleaner via the AP.
 18. The controlmethod of the robot cleaner of claim 17, wherein in the Wi-Ficommunicating step, at least one of remote control of the robot cleanerthrough the external terminal or monitoring of state information on therobot cleaner is enabled.
 19. The control method of the robot cleaner ofclaim 17, wherein power supply to the NFC module is provided onlythrough the main controller.
 20. A control method of a robot cleanersystem comprising a robot cleaner and an external terminal forwirelessly communicating with the robot cleaner, the control methodcomprising: receiving information of the robot cleaner by the externalterminal via communication between an NFC module and the externalterminal via an NFC module of the robot cleaner, where information ofthe robot cleaner includes AP information of a Wi-Fi module provided ina case of the robot cleaner; selecting a robot cleaner as a remotecontrol object through the external terminal based on the receivedinformation on the robot cleaner; accessing the AP by allowing theexternal terminal to transmit the AP information to the selected robotcleaner; and performing Wi-Fi communication between a Wi-Fi module ofthe robot cleaner and a Wi-Fi module of the external terminal.